Harry Mamaysky

QUANTSTREET CAPITAL

RYE, NY

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CRD#: 4525380

Professional summary

Harry Mamaysky is a registered financial advisor currently at QUANTSTREET CAPITAL located in Rye, New York.

Harry is registered as an IAR (Investment Advisor Representative) and started their career in finance in 2002. Harry has worked at 3 firms and has passed the Series 65, Series 63, SIE, Series 55, Series 3, Series 7 and Series 4 exams.

At a Glance

Always Fiduciary

Aliases

None

Other business activities

Outside business activity is any business or activity undertaken by an advisor that is outside the scope of their relationship with their firm (e.g., consulting services, real estate, freelance work, teaching, etc.). Investors should stay informed about these activities to ensure no conflicts of interest.

KBRA ANALYTICS, LLC; NOT INVESTMENT RELATED; 805 THIRD AVENUE, 29TH FLOOR, NEW YORK, NY 10022; SELLER OF DATA AND DATA-ANALYTICS PRODUCTS; CONSULTANT; START DATE 06/2019; 32 HOURS PER MONTH; 16 HOURS PER MONTH DURING SECURITIES TRADING HOURS

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view Harry Mamaysky's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

Certified licenses

Advisors may have various certifications and credentials from different organizations. AdvisorCheck highlights these seven certifications - AIF®, CFP®, ChFC®, CFA, CLU®, CIMA®, CPWA®

None

Experience

Current

September 13, 2021 - Present

QUANTSTREET CAPITAL

RIA

CRD#: 316095

RYE, NY

Past

October 4, 2007 - October 10, 2014

CITIGROUP GLOBAL MARKETS INC.

CRD#: 7059

NEW YORK, NY

Past

October 7, 2002 - February 23, 2006

MORGAN STANLEY & CO. LLC

CRD#: 8209

NEW YORK, NY

Primary Firm SEC Registration

This SEC-registered firm can serve clients nationwide. Some states may require the firm to submit a notice filing if the firm has more than 5 clients or a physical office there. You can view these state-level filings under the section titled "State Registrations and Notice Filings".

QUANTSTREET CAPITAL

EBH CAPITAL MANAGEMENT LLC | QUANTSTREET CAPITAL

CRD#: 316095 / SEC#: 801-135440

RIA

Registered Investment Advisory firm - (2/27/2026 Approved)

New York

Registered Investment Advisory firm - (3/2/2026 Terminated)

Texas

Registered Investment Advisory firm - (3/7/2023 Conditional Restricted)

Why is a state registration marked "Terminated"? When a firm registers with the SEC (usually after managing $100M+ AUM), it often withdraws separate state firm registrations unless required by that state. The firm can still serve clients there through its individually registered Investment Advisor Representatives (IARs).

State Registrations and Notice Filings

Listed states reflect where the advisor is authorized to serve clients under state regulations.

IAR

means the advisor is registered as an Investment Advisor Representative in this state and is authorized to provide investment advice to clients there.

Highlighted states indicate IAR registrations

IAR

New York
(9/13/2021)

IAR

Texas
(3/9/2023)

Don't see your state listed? The advisor may still be able to work with you under the federal De Minimis Rule, which allows up to five investment advisory clients in a state without registration. Some states, like TX, LA, NE, and NH, may still require registration or notice filing. Contact the advisor or their firm to confirm their investment advisory availability in your state.

Exams

What does exam status mean?

State Security Law Exam

IAR

Series 65

Status Unavailable

Passed: 6/22/2021

Uniform Investment Adviser Law Examination

State Security Law Exam

Series 63

Status Unavailable

Passed: 10/30/2002

Uniform Securities Agent State Law Examination

General Industry/Product Exam

SIE

Status Unavailable

Passed: 10/10/2014

Securities Industry Essentials Examination

General Industry/Product Exam

Series 55

Status Unavailable

Passed: 8/8/2003

Limited Representative-Equity Trader Exam

General Industry/Product Exam

Series 3

Status Unavailable

Passed: 7/1/2003

National Commodity Futures Examination

General Industry/Product Exam

Series 7

Status Unavailable

Passed: 10/4/2002

General Securities Representative Examination

Principal/Supervisory Exam

Series 4

Status Unavailable

Passed: 11/8/2005

Registered Options Principal Examination

Current Firm

QUANTSTREET CAPITAL

EBH CAPITAL MANAGEMENT LLC | QUANTSTREET CAPITAL

CRD#: 316095 / SEC#: 801-135440

RIA

Registered Investment Advisory firm - (2/27/2026 Approved)

New York

Registered Investment Advisory firm - (3/2/2026 Terminated)

Texas

Registered Investment Advisory firm - (3/7/2023 Conditional Restricted)

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Contact information

Main Address

Rye, NY

Mailing Address

1333a North Avenue No. 743, New Rochelle, NY 10804

Phone number

(212) 537-3877

Established

Firm type

Fiscal year end

# of Employees

SEC notice filing (2 States and Territories)

Documents

Customer Relationship Summary (CRS / SEC)

Latest Form ADV

Part 2 Brochures

JANUARY 2026 FIRM BROCHURE AND BROCHURE SUPPLEMENT (3/6/2026)

Regulatory assets under management

Total Number of Accounts	74
AUM (Assets Under Management)	$ 192,641,359

Red Flags

Disclosures can be potential red flags, including customer disputes, regulatory fines, employer terminations, bankruptcies, judgments, liens, or certain criminal activities.

Check for any disclosures as part of your thorough research when choosing an advisor.

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Advisor Monitoring

Firm Stability Insights

Harry Mamaysky

Professional summary

At a Glance

Aliases

Other business activities

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view Harry Mamaysky's CRS (Customer Relationship Summary).

Certified licenses

Experience

CITIGROUP GLOBAL MARKETS INC.

MORGAN STANLEY & CO. LLC

Primary Firm SEC Registration

QUANTSTREET CAPITAL

State Registrations and Notice Filings

Exams

Series 65

Passed: 6/22/2021

Series 63

Passed: 10/30/2002

SIE

Passed: 10/10/2014

Series 55

Passed: 8/8/2003

Series 3

Passed: 7/1/2003

Series 7

Passed: 10/4/2002

Series 4

Passed: 11/8/2005

Current Firm

QUANTSTREET CAPITAL

Contact information

SEC notice filing (2 States and Territories)

Documents

Part 2 Brochures

Regulatory assets under management

Red Flags

Company Information

QUANTSTREET CAPITAL

TRUST BUT VERIFY

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